| 基于非下采样contourlet变换的彩色图像增强算法 |
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| 引用本文： | 邱攀攀,何小海,梁子飞,吴小强.基于非下采样contourlet变换的彩色图像增强算法[J].四川大学学报(工程科学版),2013,45(Z2):145-149. |
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| 作者姓名： | 邱攀攀 何小海 梁子飞 吴小强 |
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| 作者单位： | 四川大学望江校区电子信息学院图像信息研究所,四川大学电子信息学院,四川大学望江校区电子信息学院图像信息研究所,四川大学望江校区电子信息学院图像信息研究所 |
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| 基金项目： | 国家自然科学基金（61071161）；国家自然科学基金委员会和中国工程物理研究院联合基金资助（11176018） |
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| 摘 要： | 本文提出一种结合DCT变换和非下采样contourlet变换的彩色图像增强算法。算法根据非下采样contourlet变换后不同子带的特点对低频子带和高频子带采用不同的增强方法进行处理；为了修复增强过程中产生的颜色偏移，对增强后的图像进行了颜色修复；最后通过简单锐化即可达到很好的效果。由实验结果可知，算法提高了图像整体对比度的同时保留了完整的边缘细节信息和色彩保真度，从视觉效果和性能指标上来看都优于curvelet变换的方法和DCT变换的方法。
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| 关 键 词： | DCT变换 curvelet变换 非下采样contourlet变换 彩色图像增强算法 |
| 收稿时间： | 2012/12/18 0:00:00 |
| 修稿时间： | 3/1/2013 12:00:00 AM |
Color Image Enhancement Algorithm Based on Nonsubsampled Contourlet Transform |
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| QIU Panpan,HE Xiaohai,LIANG Zifei and WU Xiaoqiang.Color Image Enhancement Algorithm Based on Nonsubsampled Contourlet Transform[J].Journal of Sichuan University (Engineering Science Edition),2013,45(Z2):145-149. |
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| Authors: | QIU Panpan HE Xiaohai LIANG Zifei and WU Xiaoqiang |
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| Affiliation: | School of Electronics Information Engineering, Sichuan University,, |
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| Abstract: | In this paper, a color image enhancement algorithm combined DCT transform and nonsubsampled contourlet transform was proposed. Since the difference of subband characteristics of nonsubsampled contourlet transform, different enhancement algorithms were proposed to enhance the low frequency subband and the high frequency subbands respectively. In order to fix the color shift, color restoration was applied to enhanced image. The simple sharpening was processed. From the result, the whole contrast was improved, while preserving more details and fidelity. It was better than DCT transform enhancement and curvelet transform enhancement from both visual and objective standard. |
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| Keywords: | DCT transform curvelet transform nonsubsampled contourlet transform color image enhancement algorithm |
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